Revert of Remove typedefs.h from webrtc/ root (part 1)

webrtc/modules/remote_bitrate_estimator/test/bwe.cc

Index: webrtc/modules/remote_bitrate_estimator/test/bwe.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/test/bwe.cc b/webrtc/modules/remote_bitrate_estimator/test/bwe.cc
index 566f93bfac538e3bc5830bc21eee25d3512fdbe4..abc301cfca704d61cf6b5d682c7b8270a8ff9184 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/bwe.cc
+++ b/webrtc/modules/remote_bitrate_estimator/test/bwe.cc
@@ -97,7 +97,7 @@
     case kBbrEstimator:
       return new BbrBweSender(observer, clock);
     case kTcpEstimator:
-      RTC_FALLTHROUGH();
+      FALLTHROUGH();
     case kNullEstimator:
       return new NullBweSender();
   }